Communication with submerged submarines via radio waves is difficult because seawater is conductive and absorbselectromagnetic waves. penetration into the ocean is greater at longer wavelengths, so the united states has radioinstallations that transmit at 76 hz for submarine communications. what is the approximate wavelength of those extremelylow-frequency waves? a. 500 kmb. 1000 kmc. 2000 kmd. 4000 km

An asteroid is discovered in a nearly circular orbit around the sun, with an orbital radius that is 2.47 times earth's. what is the asteroid's orbital period, its "year," in terms of earth years?

A17,250 kg rocket is pushed with a thrust of 6,450,284 n. what is the acceleration of the rocket?

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.